3-STAGE SHARPENING SYSTEM. STAGES 1 AND 2 FEATURE 100 PERCENT DIAMOND COATED CONICAL DISKS. STAGE 3 USES FLEXIBLE STROPPING/POLISHING DISKS. ELASTOMERIC SPRINGS HOLD KNIVES SECURELY AGAINST GUIDES FOR ACCURATE CONTROL OF SHARPENING ANGLES. REQUIRES NO WATER OR HONING OIL. 10 IN L X 4 1/2 IN W X 4 1/2 IN H.